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Application of methacrylatoethyl dodecyl dimethyl ammonium bromide in disperse silicon dioxide as well as composite material and preparation method of composite material

A technology of methacryloyloxyethyldodecyldimethylammonium bromide and methyl methacrylate, which is applied in the dispersion of methacryloyloxyethyldodecyldimethylammonium bromide. The application of silicon oxide and its composite materials and preparation fields can solve the problems of negative impact on the macroscopic properties of composite materials, long production cycle, complex operation process, etc.

Active Publication Date: 2017-05-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoparticles are easy to agglomerate in the PMMA matrix, and surface organic modification is usually required to achieve good dispersion in the matrix, which makes the operation process more complicated, the production cycle is long, and may have a negative impact on the macroscopic properties of the composite material.

Method used

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  • Application of methacrylatoethyl dodecyl dimethyl ammonium bromide in disperse silicon dioxide as well as composite material and preparation method of composite material
  • Application of methacrylatoethyl dodecyl dimethyl ammonium bromide in disperse silicon dioxide as well as composite material and preparation method of composite material
  • Application of methacrylatoethyl dodecyl dimethyl ammonium bromide in disperse silicon dioxide as well as composite material and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) 98wt% MMA monomer and 1wt% MEDDAB are added in the there-necked flask; 2wt% SiO is added in 240mL deionized water 2 , 1wt% MEDDAB, ultrasonically disperse the mixture, add 2.5wt% hydroxyethyl cellulose (HEC), then add it into a three-necked flask, and stir at a low speed of 400r / min. Access to N 2 After protecting for 40 minutes, raise the temperature to 75°C, and keep an inert atmosphere, add 0.8wt% initiator BPO to initiate polymerization, and adjust the speed to 700r / min; stop heating after 6 hours of reaction, and continue stirring; after 30min, reduce the speed to 400r / min min; after 15 min, the reaction ended. The reaction system was cooled and filtered, the filtered product was repeatedly washed with deionized water, and vacuum-dried at 60 °C to a constant weight to obtain P(MMA-co-MEDDAB) / SiO 2 nanocomposites;

[0036] (2) P(MMA-co-MEDDAB) / SiO 2 The copolymerization product (powder) is thermocompressed with a thermocompression molding machine. The hot p...

Embodiment 2

[0038] (1) 96wt% MMA monomer and 2wt% MEDDAB are added in the there-necked flask; 4wt% SiO is added in 240mL deionized water 2 , 2wt% MEDDAB, ultrasonically disperse the mixture, add 3.0wt% basic magnesium carbonate, then add it into a three-necked flask, and stir at a low speed of 400r / min. After 60 minutes of argon protection, the temperature was raised to 72 ° C, and the inert atmosphere was continuously maintained, and 1.5 wt % initiator azobisisobutyronitrile (AIBN) was added to initiate polymerization, and the rotation speed was adjusted to 700 r / min; after 5 hours of reaction, the heating was stopped. Continue to stir; after 40 minutes, reduce the rotation speed to 400r / min; after 10 minutes, the reaction ends. The reaction system was cooled and filtered, the filtered product was repeatedly washed with deionized water, and dried in vacuum at 50 °C to a constant weight to obtain P(MMA-co-MEDDAB) / SiO 2 nanocomposites;

[0039] (2) P(MMA-co-MEDDAB) / SiO 2 The copolymeriz...

Embodiment 3

[0041] (1) 97wt% MMA monomer and 1.5wt% MEDDAB are added in the there-necked flask; 6wt% SiO is added in 240mL deionized water 2 , 1.5wt% MEDDAB, ultrasonically disperse the mixture, add 3.0wt% hydroxycalcium phosphate (HAP), then add it into the three-necked flask, and stir at a low speed of 400r / min. After passing through helium protection for 30 minutes, the temperature was raised to 78 ° C, and the inert atmosphere was continuously maintained, and 1.0 wt % initiator azobisisoheptanonitrile (ABVN) was added to initiate polymerization, and the rotation speed was adjusted to 700 r / min; after 10 hours of reaction, the heating was stopped. Continue stirring; after 15 minutes, reduce the rotation speed to 400r / min; after 5 minutes, the reaction ends. The reaction system was cooled and filtered, the filtered product was repeatedly washed with deionized water, and dried in vacuum at 70 °C to a constant weight to obtain P(MMA-co-MEDDAB) / SiO 2 nanocomposites;

[0042] (2) P(MMA-co...

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Abstract

The invention provides an application of methacrylatoethyl dodecyl dimethyl ammonium bromide in disperse silicon dioxide as well as a composite material and a preparation method of the composite material. Based on electrostatic adsorption between positive charges carried by a surface active monomer and negative charges generated by ionization of nano SiO2 in water, and winding and wrapping effects of a dodecyl alkyl long chain of the surface active monomer on the surface of SiO2, methacrylatoethyl dodecyl dimethyl ammonium bromide (MEDDAB) carrying positive charges serving as a cationic monomer and methyl methacrylate (MMA) are subjected to copolymerization, positive charges are introduced into a polymethyl methacrylate (PMMA) matrix, and nano SiO2 is added in situ, thereby researching influences of the positive charges carried by the surface active monomer and the dodecyl alkyl long chain on dispersity of the nano SiO2 in the PMMA matrix and the interface bonding strength between the nano SiO2 and the PMMA matrix. Compared with pure PMMA resin, the tensile strength is greatly improved, and the problem existing in the aspect of mechanical strength of a PMMA material is solved.

Description

technical field [0001] The invention belongs to the field of composite materials, and more specifically, relates to a polymethyl methacrylate (PMMA) composite material, in particular, PMMA is used as a matrix, and a surface-active monomer methacryloyloxyethyl dodecyl Dimethylammonium bromide (MEDDAB) and filler nano-silica (SiO 2 ) between electrostatic adsorption, promote the dispersion of nano-silica, PMMA / SiO 2 The system is modified. Background technique [0002] Polymethyl methacrylate (PMMA) has excellent properties in many aspects. It is the best polymer transparent material so far. It has strong gas corrosion resistance, good high temperature fluidity, strong processability and low processing cost; At the same time, PMMA is non-toxic to the human body and has good compatibility with biological tissues, so it has been widely used in the field of biomedicine, mainly for oral dentures, tray powder, joint prostheses and screws, etc., and is used in medical treatment ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08K3/36C08K9/08C08F220/14C08F220/34
CPCC08F220/14C08K3/36C08K9/08C08K2201/003C08K2201/011C08L33/12C08L23/12C08F220/34
Inventor 郑俊萍丁永于宗芝
Owner TIANJIN UNIV
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